<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
<form action="/uplode" method="post" enctype="multipart/form-data">
    <input type="text" name="dir" value="headImg"><br/>
                             <!-- accept属性，浏览器会筛选本机上传的文件类型-->
    <input type="file" name="headImg" accept="image/*"><br/>
    <input type="submit" value="上传文件">
</form>
</body>
</html>